OpenGL ES Scrolling

Well when i try to scroll with opengl es on the iphone the player ship disappears... http://web-geeks.com/help.png i am trying to have one ship that scrolls with the view(the ship that is in the center of the screen) and the other one is just to see if its actually scrolling right... my problem is it that the one in the middle keeps disappears as it scrolls farther.. please help